Summary of Significant Accounting Policies Stock-Based Compensation (Policies)

12 Months Ended

Dec. 31, 2012

Stock-Based Compensation [Abstract]

Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]

Stock-Based Compensation:  The Company recognizes compensation expense in its statements of comprehensive loss for share-based payments, including stock options and restricted stock units issued to employees, based on their fair values on the date of the grant, with the compensation expense recognized over the period in which an employee is required to provide service in exchange for the stock award.  Stock-based compensation expense for awards without performance conditions is recognized on a straight-line basis. Stock-based compensation expense for awards with performance conditions is recognized over the period from the date the performance condition is determined to be probable of occurring through the time the applicable condition is met.  As of December 31, 2012, stock-based compensation cost for all outstanding unvested options and restricted stock units was $10.2 million, which is expected to be recognized over a weighted-average period of 1.3 years.

The fair value of stock options is estimated at the date of grant using the Black-Scholes method.  The Black-Scholes option-pricing model requires the input of subjective assumptions.  Because the Company’s employee stock options have characteristics significantly different from those of traded options, and because changes in the subjective input assumptions can materially affect the fair value estimate, in management’s opinion, the existing models do not necessarily provide a reliable single measure of the fair value of its employee stock options.  For purposes of determining the fair value of stock options, the Company segregates its options into two homogeneous groups, based on exercise and post-vesting employment termination behaviors, resulting in a change in the assumptions used for expected option lives and forfeitures.  Expected volatility is based on the historical volatility in the Company’s stock price.